Guardian Angels founder Curtis Sliwa got hit with a double whammy Thursday when a Manhattan Family Court judge ruled he could not slash child support for his son — and said his ex did not have to turn over embarrassing communications between him and his politician girlfriend.

Ex-wife Mary Sliwa is sitting on some 200 racy recordings — more of which her lawyer, Paul Siegert, said he planned to release — between Curtis and his baby mama, Queens Borough President Melinda Katz.

Mary published transcripts of 19 steamy conversations in January in a $1 million fraud action against the couple, alleging they conspired to steal $342,000 in marital assets while she was still married to Curtis.

The judge will decide later how much Sliwa has to pay Mary in child support for their 11-year-old son, Anthony,
who has learning and social disabilities.

Curtis, who co-hosts a WABC talk show, had asked for a reduction from $13,000 to $2,500 a month.

Katz’s attorney declined to comment. Curtis’ attorney was out of state and did not immediately return messages. ­